Polarity indicator



W. KAISLING. POLARITY INDICATOR. FILED AUG. 1. 1918.

Jan. 9, 1923.

I z/Mz/zmfrms/m Patented Jan. 2, 1 923.

for- E;

WILLIAM Kars rirne, or onions-o, rumors. ASSIGNOR 'ro KELLoee swrroi-rroann AND SUPPLY ooivrreny, or CHICAGO, rumors, A conronerron orrLLINoIs.

POLARITY INDICATOR.

Application flied-Au ust 7, 1918. Serial No. 248, 57.

To all whom it may concern:

Be it known that l, VVILLIAM KAIsLING, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Polarity Indicators, of which the following is a specification. k I My invention relates to indicators such as are used for visualizing the direction flow of current in a circuit, and whichare particularly adapted for use in connection with the electrical circuits of an automobile or thelike. Devices of the above character are commonly termed polarity indicators, and my invention has to do more particularly with the means used for securing such polarity indicators in position. It is the object of my invention to provide means which is simple in construction and cheap to manufacture, but positive in operation, for securing indicators of the above character inposition on the cowl of an automobile or any other place the'device is to be mounted. Other objects of my invention will be pointed out in theensuing specification and in the appended claims.

Referring now to the accompanying drawing, 1 hereillustrate'the preferred embodiplate .6 providedlwith a flanged portion? the said plateli having a cylindrical rear-' ment of my invention applied .to an indicator of the general type shown in my application for Letters atent, Serial No. 104,138, filed June 1.6, 1916, but it is to be understood that my invention maybe applied. to various other types of indicators and I do not wish to be limited to the exact tvpe of indicator as shown in the drawing. Reference may be had to the accompanying drawing in which like reference characters in the several-views denote like parts, in which 2,

Fig. 1 shows a front View of the indicator and a portion of the cowl member to which the indicator is shown attached;

Fig. 2 is a sectional view taken along the line 22 of Fig.1 showing the means used for securing the indicator in position inthe cowl;

Fig. 3 is a top view. of- Fig. 1 with parts broken away to more (clearly show certain features-of construction;

Fig. 4. is a left side view of Fig. 1 with parts broken away tomore clearly show cerback plate of the cap 13, through which the tain other features of construction;

Fig- 5 is a sectional view along the line 5-5 of Fig. .4; and I F ig. 6 is a side view ofthe' enclosing cap mounted on the rear of mobile.

Referring now'in general to my invention as illustrated, it comprises a polarity indicator unit A, a mounting cap or cup B, and a mounting or supporting member C, which may be the cowl or dash of an automobile. i

The polarity indicator is used as a visualizing device to show the direction of cur rent flow in the lighting and ignition circuits of an automobile so that in one instance when the indicator pointer moves to the left the accumulator or storage battery is being charged by the generator, and when the indicator pointermoves to theright the storage battery issupplying current to the operating circuits such as the lighting and ignition circuits. The cowl C of the automobile is providedwith a circularoriiice 2 of a size to receive the cylindrical portion 3. of the indicator Slots 4 and 5 are out in the peripheral edge of the opening 2,

diametrically opposite each other, for purposes to be more fully hereinafter described. The indicator Ais provided with a front tending tongues 12, 13, 14: and 15 spaced the cowl of the auto- I v equi-distant apart, the tongues 12and 14:

being; provided with reduced tongue portions 12 and 14 of a size to fit into theslots a as, respectively, which slots are cut in the cowl G. Terminalstuds 16 and 17 are secured to the indicator mechanism in any suitable mannerand are used for purposes to bedescr'ibed presently. a

Circular apertures '20 are formed in the terminal studs 16 andl? extend. A circular plate of insulating material 18 is secured to the inner surface of the back plate of the cap B by means of a rivet 19. Openings 21 are provided in the plate 18 and are in alignment with the openings 20, but are thus preventing the plate 18 from rotatingabout the rivet 19, and also keeping openin 's 20 and 21 in the cap B and plate 18 in alignment as before mentioned.-

To place the polarityindicator A in position in the cowl C of the automobile, it is only necessary to insert the said indicator A into the opening 2 in the cowl C, and the cap or cover 13 is then placed over the rear portion 3 of the indicator A in such a manner that the terminal studs 16 and 17 pass through the openings 20 and 21 in the cap B and plate 18, and the tongues 12 and la ot the extensions 12 and 14 enter the slots 1 and 5 cut in the peripheral edge of the opening 2. The tongues 12 and 14 entering the slots 1 and 5 prevent the cap 13 from rotating, and as the terminal studs 16 and 17 pass through openings 20 and 21 ofthe cap B and plate 18, the indicator is also prevented from rotating in the circular orifice 2 in the c'o'wl C. Thelock washers 24 and nuts 25 are then placed on the terminal studs, and the nuts 25 tightened until the peripheral edges of the extensions 11 and 12 and the shouldered portions 12 and 1 1 formed by the tongues 12 and'ld on the extensions 12' and 1 1 engage the surface of the cowl C, thus securely holding the polarity indicator A in position in the orifice 2 of the cowl against displacement and retation. Lock washers 26 and nuts 27 are also placed upon the studs 16 and 17, and are used. for securing the wires, which lead to the polarity indicator from the operating circuits, between the lock washers 26 and nuts 25.

The plate 18 being of somewhat flexible material and being secured to the cap B at only one point, operates to yieldingly hold the indicator in position when the nuts 25 are tightened to hold the washers 24 firmly against the plate 18. The cap B rests against the cowl of the car at only four points, the points where" the studs 12, 13, 14% and 15 engage the said cowl.

re remove the polarity indicator A from its position, it is only necessary to loosen the nuts 25 and 27 so that the cover or cap B may be removed and the indicator A taken out of the circular orifice 2;

, to be limited to the exact structure as shown and described as I am aware that my method of mounting may be used for other pieces of apparatus and for other types of indicators, and that many modifications and changes will readily suggest themselves to others; Therefore, I contemplate using my invention otherwise than in the'particular embodiment illustrated, and aim to cover allsuch changos and modifications which come within the spirit and scope otth'e appended claims.

hat I claim as new and desire to secure by United States Letters Patent is:

1. A device of the character described including an electrical instrument, a mounting member provided with an orifice adapted to receive said electrical instrument and having a slot cut through said -mounting meml er in the peripheral surface of said orifice. a cup-shaped member provided with an ear adapted to fit into said slot, and means for securing said instrument to said cup-shaped member.

2. A device of the character described including an electrical instr'ui'nent, a mounting member upon which said instrument is adapted to be mounted, a pair of rearwardly extending electric binding posts attached to said instrument, a cup-shaped member mounted against the rear of said instrument having orifices therein adapted to receive said binding posts, and means adapted to ensaid binding posts to secure said instrument and cup in position.

3. A device of the character described including an electrical instrument, a mounting member provided with an orifice adapted to receive said electrical instrument and having slot cut through said mounting member in the peripheral surface of said ori.fice,a cup-shaped member provided with an ear adapted to [it into said slot, and means for securing said instrument to said cup-shaped member, said ear and slot cooperating to prevent rotation of said cup;

4. A device of the character described including an electrical instrument, a mounting cluding an electrical instrument, a mounting member provided with an orifice for receiving said instrument and having a pair of slots cut therein, a cup having an opening slightly greater than the orifice in said mounting member and adapted to be placed over said orifice, a pair of cars for said cup adapted to fit into said slots to prevent said cup fromturning, and fastening means for securing said electrical instrument to said cup.

7 A device of the character described in cluding an electrical instrument, a mounting member provided with an orifice for receiving said instrument and having a pair of slots cut therein, a cup having an opening slightly greater than the orifice in said mounting member and adapted to be placed over said orifice, a pair of ears for said cup adapted to fit into said slots to prevent said cup from turning, and means for holding said cup in position, said means also serving as fastening means for yieldingly securing said electrical instrument to said cup and for preventing said electrical instrument from turning.

8. A device of the character described ineluding an electrical instrument, a mounting member provided with an orifice adapted to receive said electrical instrument, a pair or studs secured to said instrument and extending rearwardly, a cup-shaped member adapted to be placed against the rear of said mounting member and provided ith orifices adapted to receive said studs, and locking members adapted to be threaded onto said studs to' secure said instrument to said cup-shaped member. v

9. A device of the character described including an electrical instrument, a mounting member provided with an orifice adapted to receive said electrical instrument, a pair of studs secured to said instrument and extending rearwardly, a cup-shaped member adapted to be placed against the rear of said mounting member and provided with orifices adapted to receive said studs, locking members adapted to be threaded onto said 1 studs to secure said instrument to'said cupshaped member, and a cooperating ear'and' aperture between said instrument and said cup-shaped member to prevent rotation of said cup-shaped member, thereby preventing rotation of said instrument. i

10. A device of the character described including an electrical instrument, a mounting member provided with an orifice and adapted to receive said instrument, a stud secured to said instrument, a cap, a flexible plate secured to said cap having an orifice cut therein adapted to receive said stud,

thereby yieldingly holding'said instrument in its mounted position.

11. The combination of a mounting strip having an orifice and also slots, an instrument adapted to fit into said orifice, a flange for said instrument abutting against said mounting strip, terminal studs for saidinstrument, a. cup adapted to be secured to said instrument by said terminal studs to hold the same in place, and means integrally formed with said cup for engaging said slots to prevent the movement of said cup relative to said mounting strip, thereby preventinw movement of said instrument.

bigned b 7 me at Chicago, in the county of 

